1 October 2019
linux, linux-aws, linux-aws-hwe, linux-azure, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary
Several security issues were fixed in the Linux kernel.
Software Description
- linux - Linux kernel
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- linux-kvm - Linux kernel for cloud environments
- linux-oem - Linux kernel for OEM processors
- linux-oracle - Linux kernel for Oracle Cloud systems
- linux-raspi2 - Linux kernel for Raspberry Pi 2
- linux-snapdragon - Linux kernel for Snapdragon processors
- linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems
- linux-azure - Linux kernel for Microsoft Azure Cloud systems
- linux-hwe - Linux hardware enablement (HWE) kernel
Details
It was discovered that the XFS file system in the Linux kernel did not
properly handle mount failures in some situations. A local attacker could
possibly use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2018-20976)
Benjamin Moody discovered that the XFS file system in the Linux kernel did
not properly handle an error condition when out of disk quota. A local
attacker could possibly use this to cause a denial of service.
(CVE-2019-15538)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 18.04 LTS
- linux-image-4.15.0-1026-oracle - 4.15.0-1026.29
- linux-image-4.15.0-1047-kvm - 4.15.0-1047.47
- linux-image-4.15.0-1048-raspi2 - 4.15.0-1048.52
- linux-image-4.15.0-1051-aws - 4.15.0-1051.53
- linux-image-4.15.0-1057-oem - 4.15.0-1057.66
- linux-image-4.15.0-1065-snapdragon - 4.15.0-1065.72
- linux-image-4.15.0-65-generic - 4.15.0-65.74
- linux-image-4.15.0-65-generic-lpae - 4.15.0-65.74
- linux-image-4.15.0-65-lowlatency - 4.15.0-65.74
- linux-image-aws - 4.15.0.1051.50
- linux-image-generic - 4.15.0.65.67
- linux-image-generic-lpae - 4.15.0.65.67
- linux-image-kvm - 4.15.0.1047.47
- linux-image-lowlatency - 4.15.0.65.67
- linux-image-oem - 4.15.0.1057.61
- linux-image-oracle - 4.15.0.1026.29
- linux-image-powerpc-e500mc - 4.15.0.65.67
- linux-image-powerpc-smp - 4.15.0.65.67
- linux-image-powerpc64-emb - 4.15.0.65.67
- linux-image-powerpc64-smp - 4.15.0.65.67
- linux-image-raspi2 - 4.15.0.1048.46
- linux-image-snapdragon - 4.15.0.1065.68
- linux-image-virtual - 4.15.0.65.67
- Ubuntu 16.04 LTS
- linux-image-4.15.0-1026-oracle - 4.15.0-1026.29~16.04.1
- linux-image-4.15.0-1051-aws - 4.15.0-1051.53~16.04.1
- linux-image-4.15.0-1060-azure - 4.15.0-1060.65
- linux-image-4.15.0-65-generic - 4.15.0-65.74~16.04.1
- linux-image-4.15.0-65-generic-lpae - 4.15.0-65.74~16.04.1
- linux-image-4.15.0-65-lowlatency - 4.15.0-65.74~16.04.1
- linux-image-aws-hwe - 4.15.0.1051.51
- linux-image-azure - 4.15.0.1060.63
- linux-image-generic-hwe-16.04 - 4.15.0.65.85
- linux-image-generic-lpae-hwe-16.04 - 4.15.0.65.85
- linux-image-lowlatency-hwe-16.04 - 4.15.0.65.85
- linux-image-oem - 4.15.0.65.85
- linux-image-oracle - 4.15.0.1026.19
- linux-image-virtual-hwe-16.04 - 4.15.0.65.85
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References
Vulmon